Buttonhole-sewing machine



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{BUTTON-IDLE SEWING MACHINE Filed Aug. 6. 1927 =1 Sheets-Sheet 4 i\nv'fiTon,

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Patented Aug. 27, 1929.

UNITED STATES PATENT OFFICE.

JOHN KIEWICZ, BOSTON,MASSACHUSETTS, ASSIGNOR TO THE REECE BUTTONHOLEMACHIN E COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

BUTTON HOLE-SEWING MACHINE.

- Application filed August 6, 1927. Serial No. 211,079.

This invention relates to buttonhole sewing machines of the type adaptedto sew a buttonhole with an eye at one end and with a bar at the otherend which extends in the direction of the length of the buttonhole.

One of the objects of the present invention is to provide a buttonholesewing machine of this type which is so constructed that buttonholes ofvarying length and with or without an eye can be sewed.

It has heretofore been proposed to provide sewing machines of this typewith means whereby the buttonhole may besewed either with or without aneye, and it has also been proposed to provide sewing machines of thistype with means whereby the length of the buttonhole and the length ofthe bar may be varied.

In my present invention I have combined these two features and haveproduced-a sewing machine by which buttonholes of vary ing lengths andwith varying lengths of bar and with or without an eye, can be sewed.

In order to give an understanding of my invention, I have illustrated inthe drawings a selected embodiment thereof, which will now be described,after which the novel features thereof will be pointed out in theappended claims.

In the drawings Fig. 1 is aside view of a buttonhole sewingmachine'embodying my invention with parts broken out. I

Fig. 2 is a bottom plan view of the bed and the frame carrying thestitch-forming mechanism. V

Fig. 3 is a fragmentary sectional view illustrating the barring cam andparts associ- -.ated therewith.

1*: igs. land. 5 are sections on the line 44 Fig. 2 illustrating theparts in different position.

Fig. 6 is a section on the line 6-6 Fig. 4.

Figs. 7 8, 9 and 10 illustrate different types of buttonholes which maybe made with the machine herein illustrated.

Fig. 11 is a view showing the means emloyed for adjusting the machine.for bars 0 different lengths. v Fig. 12 is a section on the line 1212Fig. 2. ig. 13 is an underside view of the main cam.

Fig. 14 is a top view of the main cam on a reduced scale. I

Fig. 15 is an enlarged section on line 15-15 Fig. 2.

I have illustrated the invention as it might be embodied in a sewingmachine such as is shown in my co-pend-ing application Serial N 0.189,792 filed May 9, 1927.

Before describing the machine indetail, I will refer to Figs. 7 to 10which illustrate different types of buttonholes that can be sewed on themachine.

. Fig. 7 shows the usual buttonhole with the eye at one end and with abar at the other end extending in the'direction of the length ,4

of the buttonhole.

Fig. 8 shows a similar buttonhole, but 7 hole has the bar 6 which is inthe line of the slit 1 and extends in the direction of the length of thebuttonhole. This bar is formed by shifting the stitch-forming mechanismand work-holding means laterally with reference to each'otherwhen thesewing reaches the end of the slit, so that the two lines of stitchingare superposed upon each other to make the bar 6. The eye of thebuttonhole is formed in the usual way by iving the workholding means andstitchorming mechanism a relative lateral vibrating movement whilesewing around the end of the buttonhole.

The sewing machine herein illustrated is so constructed that if it isdesired to sew a buttonhole with an eye, but without the bar; thestitching will not be started until after the stitch-forming mechanismand workholding means have been given their lateral movement to placethe parts in relative position for stitching the sides of thebuttonholes. If, on the other hand, a buttonhole without an eye isdesired, then the means for giving the stitch-forming mechanism andworkholding means their relative lateral vibrating movement While sewingaround the buttonhole is rendered inoperative, with the result that abuttonhole of the types shown in Figs. 9 and 10 will be formed.

The work-holding means and stitch-forming mechanism of the machineherein illustrated are such as are commonly found in buttonhole sewingmachines. The work holding means comprises the usual work clamps 7 whichare pivotally mounted'on clamp plates 8 that are supported on the bed 9of the machine. The stitch-forming mechanism comprises the usual needle10 operating from above the'work and the usual under-thread handlingmechanism, which is carried by a turret'll that is situated beneath thebed-plate 9. The stitch-forming mecha nism is carried by a head or frame12 which is mounted on the bed-framc 9for to and fro movement, saidframe 12 having a supporting portion 13 beneath the bed-plate 9 and inwhich the turret 11 is mounted. The work is thus clamped to thebed-plate 9 by the work clamps 7 and the frame 12 carrying'thestitchforming mechanism is adapted to move back and forth on the bedduring the sewingof the buttonhole, all as shown in United StatesPatents No. 488,028, December 13, 1892, and No. 494,280, March 28, 1893.This movement of the frame is derived from the main cam 14 which ismounted in a cam casing 15 carried by the frame 12, said cam having'afeed groove 16 in its upper face, in which is received a stationary stud17 depending from the bed 9. The rotation of the cam will move the frame12 to and fro, all as described in the'iiboVe-mentioned patents.

In the operation of buttonhole sewing machines of this type, the machineis brought to rest at the end of a cycle of operations with the parts inbuttonhole cutting position, and when the machine is set in operationthe cam 14 is given an initial movement by a high speed drivingmechanism during which the frame 12 is shifted from buttonhole cuttingto stitching position, as shown by the full and dotted line positions ofthe needle in Fig. 1. WVhen the stitching position has been reached, thehigh speed driving mechanism is disconnected from the cam 14 and theshaft 18 which operates the stitch-forming mechanism is set inoperation. The cam 14 is then rotated at a slower speed from the shaft18 thereby giving the frame 12 the necessary movements to cause thestitching to be formed along the edges of the buttonhole, all asdescribed in the above-mentioned patents.

During the sewing around the end of the buttonhole, the stitch-formingmechanism is turned about a vertical axis by mechanism similar to thatshown in patent No. 655,637 dated August 7, 1900. This mechanism com- 10and the turret 11.

is separate from the main cam 14 and in" carries two pins 43 and 44 thatare adapted prises a lever 19 pivoted to the cam housing 15 at 20 andconnected by a link. 21 to an arm 22 that is rigid with a vertical rockshaft 23. This rock shaft has two gear sectors 24 and 25 thereon whichmesh with gears 26 and 27 on the carrier for the needle The'lever 19 hasa follower operating in a cam groove 28 formed in the underside of thecam 14, all as illustrated in the above-mentioned patent. This camgroove is so shaped as to operate the lever 19 and thereby rotate thestitch-forming mechanism at the end of the buttonhole. v

The machine herein shown is provided with the usual means similar tothat shown in the various patents above-mentioned for giving the frame12 a vibrating lateral movement while the stitch-forming mechanism issewing around the eye end of the buttonhole. This means comprises asinuous cam groove 29 formed in the underside of the main cam 14 inwhich groove operates a follower 30 carried by one end of a lever 31.This lever is fast on a shaft 32 which is jour- Du naled in a bearing 33in the frame 12, said shaft having at its upper end an arm 34, which, inturn, carries a block 35. that operates in a groove in the bed frame 9.This construction is shown quite clearly in the above Patent No.488,028. The vibrating movement given to the lever 31 by the cam groove29 will give the head or frame 12 and consequently the stitch-formingmechanism a lateral vibrating movement. r

In the present machine the relative lateral movement. of thestitch-forming mechanism and work-holding means necessary to form thebar is derived from a barring cam, which this respect the constructionshown is similar to that illustrated in my co-pending application SerialNo. 189,792, filed May 9, 1927. This barring cam is shown at 36 and issituated beneath the bed plate 9 and is connected by a stud 37 thatextends through the bed plate with the slide 38 that controls the lengthof the buttonhole. The operation of this slide in thus determining thelength of the buttonhole is set forth in my abovementioned co-pendingapplication and also in the patents above-referred to, to which may beadded United States Patent No. 713,764, dated November 18, 1902.

This barring cam is provided with two cam grooves 39 and 40, each ofwhich has an offset or cam portion 41 as best seen in Fig. 2. Theportion 13 of the frame 12 has extending therefrom a bracket arm 42which to operate in the-cam grooves 39 and 40, one pin only beingoperatlve at any given time.

When the machine starts at the beginning of the sewing operation, thepin 43 is operat ing in the groove 39, and as the head 12 moves to theright Figs. 1 and'2 during'the sewing on the first side of thebuttonhole, the cam portion 41 of the groove 39 will give the headforming mechanism in a lateral direction du ing the formation of thebarring stitches and the side stitches of the buttonhole, all asdescribed in my co-pending application. It will be understood that thecam groove in a which the follower 30 operates, is made with widerportions 45 to allow free movement of the follower 30 when the lateralmovement of the head 12 is being controlled by; the pins 43 and 44.

v The means for controlling the pins-43 and 44v and throwing first oneand then the other into operative position, is similar to that shown inmy above-mentioned co-pending application, Serial No. 189,792.

Pin 43 is provided at its lower end with a groove 46 in whichis receivedone arm of a pivot lever 47 pivotedat 48 to the portion 13 of the frame.The pin 44 is provided with a similar groove 46 in which is received anarm 50 that is rigid with asleeve 51 loosely mounted on the stud 48.Each'arm is acted upon by a spring 52, said springs tending normally tourge the pins 43 and 44 upwardlytoward the barring cam 36. The elbowlever 47 is connected by a link connection 53 with an arm 54 extendinglaterall from the lever 19 and .the sleeve 51 has rigi therewitha'depending arm 55 which is connected by a link connection 56 withanother arm 57 extending laterally from the lever 19 and disposedoppositelylto the arm 54.

During the sewing on the first side of the buttonhole and while the head12 is moving from its groove 39. This is accomplished by tothe rightFig. 1, the pin 43 is elevated and the upper end thereof is operating inthe slot 39, the pin 44 at this time being inits lowered position. I p 4As the stitching approaches the eye end of the buttonhole and just asthe follower 30 enters the sinuous groove 29 for forming the eye, thepin 43 is depressed and withdrawn the engagement of an xup-standing arm73 which is rigid with the arm 47 with a's'top device 71. The engagementtakes place just before the lhead 12 completes its movement to the rightFig. 1, so that during the final -movement, the arm 47 is moveddownwardly.

During the sewing around the end of the buttonhole the lever 19 is swungfrom the full to the dotted line position and during such swingingmovement the connection 56 is moved to the left Fig. 2 thereby releasingthe arm 50 and allowing its spring 52 to raise it and the pin 44 intoengagement with the barring cam 36. The raised pin 44 will enter thegroove 40 so that during the return movement of the head 12, and whilethe stitching on the second side of the buttonhole is being performed,said head will be controlled as to any lateral movement by the camgroove 40.

i It will be understood that when the pin 44 stitching is being formedaround the eye of the buttonhole, while if a buttonhole without an eyeis to be formed, the control of the lat eral movement of the head 12will be retained by the barring cam throughout the buttonhole sewingcycle. 'If a buttonhole with an eye is to be sewed, then during thesewing around the eye end of the buttonhole the follower 30 will beoperativelyaengaged in the sinuous groove 29 and both pins 43 and 44will-be withdrawn from operative engagement with the barring cam 36. Onthe other hand, if abuttonhole without an eye is to be sewed (such asshown in Figs. 9 and 10) then the follower 30 will be renderedinoperative during the sewing around the eye end of the buttonhole, and,therefore, the head 12 will not be given any vibrating jogging movementby the sinuous cam groove 29, but instead the pins 43 and 44 will beoperative to hold the head from lateral movement, so that at the end ofthe buttonhole, the stitch-forming mechanism will simply turn about itsaxis and produce the round end 58 to the buttonhole, as shown in Figs.9'and10 The follower 30 is shown as slidably mounted in the lever 31,said follower being in the form of apin whichis capable of verticalmovement through a sleeve 59 carried by the end of the lever 31. Thispin 30 has a lateral arm 60, which extends through a 3 guide slot 61 ina bracket 62 that is carried by the arm 31. The projection 60 is actedupon .by a spring 63 which urges the pin 30 upwardly. hen the/buttonholewitliggan e e is to be sewed, the pin or follower 30wil be i brat'inlateral movement Means are herein provi ed whereby. the pin 30 may bewith drawn from engagement wit-h the main cam 14 when it is desirable toform a buttonhole without n eye, as shown in Figs. 9 and 10.

the cam surface 66 is placed so that as the head and the cam casing movetoward the right, Figs. 1 and 2 (or toward the left in Figs. 4 and 5)the cam surface 66 will be engaged by a roll 67 that is carried by thefollower pin 30. Assuming that the lever 64 is swung into its operativeposition, shown in dotted lines Fig. 2 at the beginning of the sewing ona buttonhole, such movement will bring the body of the lever. above theroll .67 as shown in Fig. 4. As the head 12 moves toward the right insewing along the first side of the buttonhole and just before the eyeend of the buttonhole is reached, the roll 67 will enga e the camsurface 66 with the result that the follower pin will be forceddownwardly out of engagement with the cam 14. When the eye end ofthebuttonhole is reached, therefore, there will be no lateral vibratingmovement-of the head which is necessary to form the eye, because of thefact that the follower pin 30 is disengaged. from the cam 14. As aresult, the turning of the stitch-forming mechanism around the end ofthe buttonhole will produce a buttonhole with the round end. 58.

In order to maintain proper control of the head 12 while stitchingaround the end of the buttonhole when the follower pin 30'is in itsinoperative position, it is necessary to have said head controlled as toits lateral movement by the barring cam 36, and, consequently, means areprovided whereby when the follower pin 30 is moved into its inoperativeposition the pins 43 and 44 will remain operative to control the lateralmovement of the head duringthe sewing around the end of the buttonhole.The lever 64 extends forwardly beyond its pivot 65, and the forward endis pivotally connected to a rod or bar 68 that is slidably mounted inbearings 69 carried on the underside of the bed 9. This bar has rigidtherewith an arm which extends to the rear of the levers 47 and 50 andis provided with a laterally extending end or head 71. The constructionis such that whenthe lever 64 is in its inoperative position, shown infull lines Fig. 2 the end 71 will be in position to engage theup-standing arms 72 and 7 3 which are rigid with the levers 50 and 47,this engagement occurring just before the head reaches the end of itstravel towards the right.

The engagement of the head 71 with the upstanding arms 72 and 73 asshown in Fig. 3 results in swinging the arms 50-47 downwardly, therebydepressing the pins 43-44 and withdrawing them from engagement with thebarring cam 36. This occurs just as the follower 30 passes from the wideportion 45. of the groove 29 into the sinuous portion thereof, and whilethe stitch-forming mechanism is turning around the end of thebuttonhole. \Vith this adjustment of parts the buttonhole with the eye,as shown in Figs. 7 8, will be formed.

If the buttonhole without the eye, as shown in Figs. 910 is to be sewed,the lever 64 will be swung into its operative position, shown in dottedlines Fig. 2. When in this position, the cam face 66 is so placed as toengage the stud 67 and withdraw the follower 30 from engagement with thecam 14 at the time that the stitch-forming 'mechanism is turning aroundthe end of the buttonhole. The placing of the lever 64 in'its operativeposition also shifts the rod 68 into the dotted line position Fig. 2thus moving the arm 70 into a position where the head 71 thereof is outof line with the up-standing arms 72 and 73. Consequently, when the;parts are in the dotted line position Fig. 2, the head 71 is in itsinoperative position and it will not act on the lip-standing arms 7273.As a result, the pin 43 will remain in its groove 39 until the head 12reaches the end of its movement and during the swinging of the lever 19by which the stitch-forming mecha nism is turned about the end of thebuttonhole, said pin 43 will be withdrawn by the connection 53 and atthe same time the. pin 44 will be freed by the forward movement of theconnection 56, so that the spring 52 will raise the pin 44 intooperative engagement with the cam groove 40.- The grooves 39, 40 arespaced the same at the right hand end as are the pins 43, 44 so that asthe pin 43 is withdrawn from its slot, the other pin 44 may enter theother slot. The right hand ends of the slots 39, 4O are'straight andhence when the follower30 is thus rendered inoperative, the head 12 willbe held from lateral vibrating movement as the stitch-forming mechanismis turning around the end of the buttonhole. This will produce thebuttonhole without the eye, as shown in Figs. 9, 10.

In order to hold the lever 64 in either of its adjusted positions, Ihave employed the expedient shown in Fig. 15. The bar 68 operates in anopening 74 in a bracket 69 that is secured to the bed 9. Said bar has onits underside two notches 75, 76, one of which is adapted to engagethebottom 77 of the open- "tains the bar 68 inits adjusted position, but

permits it to be shifted from one position to the other.

ing 74 when the bar is in one position, and g I have illustrated inFigs. 8, 10 two buttonholes without the bar. The means provided forsewing a buttonhole without the bar are the same as those described inmy co-pending application, Serial No. 189,792. This is accomplished byproviding means for adjusting the barrin cam relative to the controllingbar 38, said adjustment permitting. the barring cam to be so placed thatthe engagement of the pin 43 with the cam portion 41 of the slot 39 willoccur before the stitchforming mechanism is set in operation, while theengagement of the pin 44 with the cam portion 10 will occur after thestitch-forming mechanism has come to rest.

The controlling bar 38 is provided with an extension 80 to which thebearing cam 36 is secured by the clamping screw 37. This extension 80 isadjustably secured to the bar 38 by means of a clamping screw 81 whicheX- tends through a slot 82 in the extension 80 and screws into the bar38. When the clamping screw 81 is loosened the barring cam may beadjusted toward the left, thus placing it in a position to form thebarless buttonhole. To facilitate this adjustment, the extension 80 isprovided with a lever 83 pivoted thereto at 84 and having a forkedportion 85 embracing a pin 86 extending upwardly from bar 38 andoperating in the slot 82. When, therefore, the screw 81 is loosened theadjustment of the barring cam may be effected by turning the lever 83.

I claim:

1. In a buttonhole sewing machine, the combination with stitch-formingmechanism and work-holding means having a relative movement to formstitches along the sides of abuttonhole and around one end, aneyeforming cam forgiving said stitch-forming mechanism and work-holdingmeans relative and work-holding means having a relative movement to formstitches along the sides of a buttonhole and around one end, of ane e-.forming cam for giving said stitch-forming mechanism and work-holdingmeans relative lateral vibiating movement while stitching around the endof the, buttonhole, thereby to form an eye, a stationarily-mountedbarring cam for controlling the relative lateral movement of thestitch-forming: mechanism and work holding means at the other end of thebuttonhole thereby to form a bar, and means to render either theeye-forming cam or the barring cam operative for controlling suchrelative lateral movement while stitching around the end of thebuttonhole.

3. In a buttonhole sewing machine, the combination with stitch-formingmechanism and Work-holding means having a relative movement to formstitches along the sides of a buttonhole and around one end, aneyeformingcam, means actuated thereby to give the stitch-formingmechanism and workholding means a relative lateral vibrating movementwhile sewing around the end of the buttonhole, a stationarily-mountedcam element, means actuated thereby to prevent such relative lateralmovement while sewing around the end of the buttonhole, and. means torender either the eye-forming cam or the stationarily-mounted camelement operative and the other inoperative.

4. In a buttonhole sewing machine, the combination with stitch-formingmechanism and work-holding means having a relative movement toformstitches along the sides of a buttonhole and around one end, aneyeforming cam, means actuated thereby to give the stitch-formingmechanism and. workholding means a relative lateral vibratingmovementwhile sewing around the end of the buttonhole, astationarily-mounted cam ele ment, means actuated thereby to preventsuch relative lateral movement while sewing ders the eye-forming caminoperative and the I stationarily-mounted cam element operative, and inanother position renders the eye-forming cam operative; and the saidstationarilymountedcam element inoperative.

5. In a buttonhole sewing machine, the combination with stitch-formingmechanism and work-holding means movable relatively to form stitchesalong the sides of a buttonhole and around one end, of two cam devicesfor controlling relative lateral movement of the stitch-formingmechanism and workholding means while sewing around the end of thebuttonhole, one of said cam devices be ing stationarily mounted andmeans to render either cam device operative and the other in operative,one cam device giving the: stitch forming mechanism and work-holdingmeans a relative lateral vibrating movement, and the other cam devicepreventing relative lateral movement. v

6. In a buttonhole sewing machine, the combination with stitch-formingmechanism and work-holding means movable relatively to each other toform stitches along the sides of the buttonhole andaround one end, of aneye-forming cam for giving the stitch-forming mechanism and'work-holdingmeans a relative lateral vibrating movement while stitching around oneend of thebuttonhole thereby to form an eye, a stationarily-mountedbarring cam, means co-operating there- V render either the eye-formingcam or the barring cam operative while so sewing around the end of thebuttonhole, whereby a button hole either with or without an eye may besewed.

7. In a buttonhole sewing machine, the combination with stitch-formingmechanism and work-holding means movable relatively to each other toform stitches along the sides and around the end of a buttonhole, of aneye forming cam for giving said stitch-forming mechanism andwork-holding means relative lateral vibrating movement while sewingaround one end of the buttonhole, a barring cam element and connectionsactuated thereby for giving said stitch-forming mechanism andwork-holdingmeansrelativelateralmovement while sewing at the other endof the buttonhole thereby to form a bar extending in the direction ofthe length of the buttonhole, said barring cam element being bodily ad-.justable thereby to provide for adjusting the length of the bar saidbarring cam being also adapted to control the said relative latrendering the barring cam or the eye-forming cam operative while sosewmg around the first-named end of the buttonhole, said barring camwhen operative preventing such relative lateral movement.

8. In a buttonhole sewing machine, the combination with work-holdingmeans and stitch-forming mechanism movable relatively to form stitchesalong the sides and around the end of .a buttonhole, of two camelements, a follower for each cam element, connections co-operating withthe followers for controlling the relative lateral movement of thestitch-forming mechanism while sewing around the end of the buttonhole,one cam element operating to produce such lateral move ment, and theother cam element operating to prevent it, and means to withdraw eitherfollower from engagement With its cam element, whereby a buttonhole withor with ut an eye may be sewed.

9, In a buttonhole sewing machine, the combination with WOIlI-llQldlIlgmeans and -sti Cll-fOlIIllIlg mechanism movable relativeform stitchesalong the sides and around, the nd of a buttonhole, of two cam elements,

a fol ower for each cam element, connections co-operating with thefollowers for controllingthe relative lateral movement of the tonhole.

stitch-forming mechanism while around the end of the buttonhole, one camelement operating to produce such lateral movement, and the other camelement operating to prevent it, and a controlling member operating inone position to withdraw one follower from engagement with its camclement.

, and in' another position to withdraw the other follower fromengagement with its cam element whlle sewing around the end of a butlO.In a buttonhole sewing machine, the combination with stitch-forn'lingmechanism and work-holding means having a relative movement in thedirection of the length of the buttonhole to form stitches along thesides of the buttonhole and around one end, an eyeforming cam for givingsaid stitch-forming mechanism and work-holding means relative vibratinglateral movement while the stitching is being carried around said end ofthe buttonhole thereby to form an eye, means to render the eye-formingcam either operative or inoperative, a cam element separate from theeye-forming cam, means controlled there by to prevent the stitch-formingmechanism and work-holding means from relative lateral movement duringthe sewing around said end of the buttonhole, said cam element and the'means controlled thereby having the same relative movement in thedirection of the length of the buttonhole as the stitch-formingmechanism and the work-holding means, and means to render the camelement operative when the eye-forming cam is inoperative.

11. In abuttonhole sewing machine, the combination with a bed frame, ofwork-holding means carried thereby, a stitch frame, stitch-formingmechanism carried thereby, said bed frame and stitch frame having arelative movement in the direction of the length of the buttonhole, aneye-forming cam carried by the stitch frame for giving saidstitch-forming mechanism and work-holding means relative vibratinglateral movement while the stitching isbeing carried around one end ofthe buttonhole thereby to form an eye, means to render the eye-formingcam operative or inoperative, a cam element separate from theeye-forming cam and carried by the bed frame, and means controlledthereby during the relative movement of the stitch sewing frame and bedframe to prevent the stitch-- forming mechanism and work-holding meansfrom having a relative lateral movement during the sewing around the endof the buttonhole, and means to render said cam element operative whenthe eye-forming cam is inframe, two cam devices for controlling relativelateral movement of the work-holding means and the stitch-formingmechanism while sewing around one end of the buttonhole, one of said camdevices being carried by the stitch frame and the other by the bedframe, and means to render either cam device operative and the otherinoperative, one cam device giving the stitch-forming mechanism andwork-holding means a relative lateral vibrating movement, and the othercam device preventing such relative lateral movement.

13. In a buttonhole sewing machine, the combination with a bed frame, ofwork-holding means carried thereby, a stitch frame, stitch-formingmechanism carried thereby, saidstitch frame having a movement on thehole, a cam device carried by the bed frame,

means controlled thereby to prevent such lateral relative movementbetween the stitchforming mechanism and work-holding means, and acontrolling member which in one position renders the eye-forming caminoperative and the cam device operative and in another position rendersthe eye-forming cam operative and the cam device inoperative.

In testimony whereof, I have signed ,my name to this specification.

JOHN KIEWICZ.

